Body temperature hearing aid

ABSTRACT

A hearing aid device including sensors are disclosed. Specifically, a hearing aid with a temperature sensor and a reference sensor. Also disclosed is a method for estimating body core temperature.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of co-pending application Ser. No.16/425,486, filed on May 29, 2019, which claims priority under 35 U.S.C.§ 119(a) to application No. 18175214.8, filed in Europe on May 30, 2018,all of which are hereby expressly incorporated by reference into thepresent application.

The present disclosure relates to hearing aids. More particularly, thedisclosure relates to methods and systems in and for hearing aid device,where the body temperature of the person wearing the hearing aid ismeasured. Further, the present disclosure relates to methods forcompensating body temperature measurements obtained via hearing aids.

Hearing aids may be provided in different configurations, such ascommonly denoted In-the-Ear, Receiver-In-the-Ear, Behind-the-Ear and soforth.

In-the-ear hearing aid devices (ITE) usually comprise an exteriorhousing (of an in-the-ear unit thereof) and an electro-acoustic outputtransducer arranged therein. Receiver-In-the-Ear (RITE) hearing aiddevices usually comprise an exterior housing configured to be positionedbehind the ear of the user, with an electro-acoustic output transducerarranged in a separate housing configured to be placed at least partlyin the ear canal of the user. Behind-the-Ear hearing aid devices (BTE)usually comprise an exterior housing configured to be positioned behindthe ear of the user, with an electro-acoustic output transducer arrangedin the same housing and be configured to be connected to a hollow tubearranged for guiding acoustic sound from the output transducer to theear canal of the user.

The electro-acoustic output transducer is often termed a receiver and isconfigured to convert an electric audio signal into an acoustic soundsignal. The electric audio signal may be provided by a sound processor.The sound processor may receive an electric audio input signal andprocess the electric audio input signal to generate a processed electricaudio signal to be fed to the output transducer. The sound processor mayprocess the sound so as to compensate for a specific hearing loss of theintended user.

The sound processor may be provided in a behind-the-ear unit of thehearing aid or for the ITE hearing aid in the housing configured to bepositioned in or at the ear canal. The electric audio input signal maybe received from an electro-acoustic input transducer. Alternatively, orin combination herewith, the electric audio input signal may be receivedwirelessly, e.g. via an RF radio channel, such as via a Bluetoothconnection or the like, or other types of wireless signals, such astelecoil, inductive systems or the like. The electro-acoustic inputtransducer may be provided in the in-the-ear unit or may be provided inthe BTE unit. The electro-acoustic input transducer is called microphoneand converts an acoustic sound signal into an electric audio signal.

In RITE hearing aids, the sound processor is typically arranged in theBTE unit and is connected to the electro-acoustic output transducer (andthe electro-acoustic input transducer) by way of electrically conductingwires arranged in a coupling element (connection tube) that mechanicallyconnects the in-the-ear unit to the behind-the-ear unit.

When people wear a hearing aid, the device is usually placed in closecontact with the head of the user, and if a temperature sensor isincluded and arranged as close to the ear drum as possible, within thehearing aid housing or the in-the-ear-canal housing having the receiveras well, it is possible to obtain a measurement of the temperature inthe ear canal, which may be used as an estimate of the core temperatureof the user. This, first, temperature sensor is thus utilized toestablish an estimate of the core temperature of the person wearing thehearing instrument from inside the ear(canal) using a sensor attached tothe receiver. In addition to the usual measurement insecurities, otherfactors may degrade the estimate.

Therefore, there is a need to provide a solution that at least providesan improved estimate of the body temperature of the person wearing thehearing aid, and at least alleviates some of the above-mentionedproblems. The present disclosure provides at least an alternative to theprior art.

In a first aspect, the present disclosure provides a hearing aid havinga first housing, the first housing being configured to be positioned atleast partly in the ear canal of the user. The hearing aid may furthercomprise a first temperature sensor arranged in the first housing, andan output transducer arranged in the first housing. The hearing aid mayfurther comprise a temperature processor configured to process signalsfrom the first temperature sensor, and a reference temperature sensor incommunication with the temperature processor. By having such twotemperature sensors, during use preferably arranged with as large adistance between them as possible, it becomes possible to improve theestimate of the core temperature of the user. The hearing aid mayfurther comprise that the temperature processor may be configured toestimate, based on both the first measure body temperature of the userand the reference temperature, a core body temperature of the user.Further, this configuration allows for an improved comfort of the useras it does not require a closed environment in the ear canal. Incontrast, it is possible to implement the hearing aid as what issometimes referred to as an open system where ambient sound is allowedto enter the ear canal and reach the ear drum and air is also allowed toescape the inner part of the ear canal.

The first housing may further comprise an output transducer, wherein theprocessor may then be further configured to provide the estimate basedon output transducer activity. This is advantageous in that it becomespossible to compensate the temperature estimate by compensating for thelocal heating of the temperature sensor which originates from the heatdevelopment in the output transducer. The information may be obtainedfrom the processor processing the incoming sound and generating thecompensated sound signal. This processor may in some instances beimplemented in the same, physical, processor as the mentionedtemperature processor.

The first housing may comprise a first end and an opposite second end,wherein the first temperature sensor is arranged in the second end ofthe first housing and the output transducer is arranged at an extreme ofthe second end. The first housing may be an elongated housing where theoutput transducer is positioned at one end, e.g. at an extreme end ordistal end, and the temperature sensor is then positioned in the samehousing. There may be included some temperature barriers so as to reducethe transfer of heat from the output transducer to the temperaturesensor. The first housing may be configured to receive a dome so thatwhen the user uses the hearing aid, the first housing is morecomfortable to wear.

The hearing aid may further comprise a second housing, the referencetemperature sensor may then be arranged in the second housing. Thiscould for instance be a housing configured to be positioned behind theear of the user. In other instances, the second housing may beconfigured to be positioned in the concha of the user and/or the fossatriangularis. The second housing may be mechanically connected to thefirst housing, e.g. via a connecting member. A connecting member mayinclude one or more electrically conducting members, which may be usedfor carrying, i.e. sending, signals to/from one of the houses to theother. Such a communication may be one-way or both ways. The firsthousing, the connecting member and the second housing may enable ahearing aid to be configured as a so-called receiver-in-the-ear hearingaid. In such a hearing aid, the first housing is configured to belocated in the ear canal of the user, the second housing configured tobe located behind the pinna of the user and the connecting member to actas a connecting between the two housings. Other configurations arepossible, such as mentioned the second housing in the helix, anti-helixor elsewhere in/at the pinna.

An RF antenna may be included in the hearing aid. The RF antenna couldbe arranged in the housing to be positioned behind the ear of the user.The RF antenna could be arranged in an element configured to connect anin-the-ear housing with a behind-the-ear housing. The RF antenna couldbe arranged so as to be positioned in the concha while the user wearsthe hearing aid.

The reference temperature sensor may be arranged in an external devicein wired or wireless communication with the temperature processor. Thiscould allow for a more accurate ambient temperature estimate, as such asmeasurement could be less influenced by the body heat of the user.

An inductive communication system may be included in the hearing aid.Such an inductive communication system may be used for communicatingwirelessly between hearing aids positioned at opposite ears of a user,as inductive communication have shown to be energy efficient whencommunicating through the head of the user, whereas high frequencycommunication have proved to be less efficient.

The external device may be a telephone device or an auxiliary devicehaving a microphone array. This could be beneficial as such devices areoften already carried by hearing aid users. Further, if a telephone,such as a smartphone, is used, an user interface thereof may be used toprovide the user with health related information, e.g. information basedon estimates of body core temperature and/or other body related data.

The hearing aid may further comprise a motion sensor configured toprovide an indication of movement of the hearing aid, and thetemperature processor includes movement of the hearing aid as a measureof movement of the user when estimating the core body temperature of theuser. Motion/movement of the user could influence the user, i.e. if theuser is engaged in physical activity, both ear canal temperature andexternal temperature may be influenced by increased body temperature.Also, local cooling of the hearing aid may occur as local increasedmoisture at the ear may decrease due to the user moving around.

The hearing aid may further comprise a secondary sensor configured toobtain a measure indicative of wind at the hearing aid, and thetemperature processor includes wind measure at the hearing aid whenestimating the core body temperature of the user. It could be beneficialto include additional sensors for, in total, obtaining several physicalmeasures, all of which could help improve estimate of the core bodytemperature. As mentioned, wind could decrease temperature at the ear,resulting in a lowered reference temperature, which again could changethe estimate of the body core temperature.

In a second aspect, the present disclosure relates to a method ofobtaining an estimate of the core body temperature of a user. The usercould be wearing a hearing aid according to the first aspect. The methodmay include a step of arranging the first housing in or at the ear canalof the user so that the first temperature sensor is in the ear canal ofthe user, the reference temperature sensor being arranged, at leastpartly, outside the ear canal of the user. As mentioned, the referencetemperature sensor may be external to the hearing aid, or may beexternal to just the first housing, e.g. positioned in a behind-the-earhousing while the first temperature sensor may, still, be positioned asclose as possible to the ear drum of the user. Physically it is notalways possible, or desirable, to place the first temperature sensor indirect contact with the ear drum. The method may include a step ofobtaining from the first temperature sensor a first measure of bodytemperature of the user. The method may include a step of obtaining areference temperature from the reference temperature sensor. The methodmay include a step of estimating, based on both the first measure bodytemperature of the user and the reference temperature, a core bodytemperature of the user. The estimate may be established by including anumber of prior measurements. This could be done to reduce the risk ofbasing the estimate, entirely, on spikes/extremes in the measurement.

The hearing aid used in the method according to the second aspect mayinclude a first housing configured to be positioned at least partly inthe ear canal of the user, the first housing including a firsttemperature sensor, a temperature processor configured to processsignals from the first temperature sensor, a reference temperaturesensor in communication with the temperature processor.

The first housing may further comprise an output transducer, and themethod according to the second aspect may comprise a step of includingoutput transducer activity when estimating the core body temperature.

The reference temperature sensor may be arranged in an external devicein wired or wireless communication with the temperature processor, andthe method according to the second aspect may comprise a step ofcommunicating the reference temperature wired or wirelessly from theexternal device to the temperature sensor.

The hearing aid may further comprise a motion sensor configured toprovide an indication of movement of the hearing aid, and the methodaccording to the second aspect may comprise a step of obtaining datarelating to movement of the hearing aid as a measure of movement of theuser, and the step of estimating the core body temperature of the userincludes the data relating to movement of the hearing aid.

The hearing aid may further comprise a secondary sensor configured toobtain a measure indicative of wind at the hearing aid, and the methodaccording to the second aspect may comprise a step of obtaining datarelating to wind measure at the hearing aid, and the step of estimatingthe core body temperature of the user includes the data relating to windmeasure.

The hearing aid according to the first aspect may be included in abinaural hearing aid system where a hearing aid is arranged atrespective left and right ear of a user, and the two hearing aids areconfigured to exchange data wirelessly or wired. This exchange couldinclude sending sensor data from one hearing aid to the other, eitherraw sensor data or processed data, i.e. data indicating situationsdetermined based on data from the sensor or sensors. The two hearingaids of the binaural hearing aid system may be operated based on datafrom a sensor in each hearing aid, e.g. similar sensors arranged in eachhearing aid, or, different sensor types, where the left hearing aid asone type of sensor, and the right hearing aid has a second type ofsensor being different from the first type of sensor.

The method may also be adapted to operate on a binaural hearing aidsystem accordingly.

All features mentioned in relation to the first and second above may becombined where appropriate.

BRIEF DESCRIPTION OF DRAWINGS

The aspects of the disclosure may be best understood from the followingdetailed description taken in conjunction with the accompanying figures.The figures are schematic and simplified for clarity, and they just showdetails to improve the understanding of the claims, while other detailsare left out. Throughout, the same reference numerals are used foridentical or corresponding parts. The individual features of each aspectmay each be combined with any or all features of the other aspects.These and other aspects, features and/or technical effect will beapparent from and elucidated with reference to the illustrationsdescribed hereinafter in which:

FIG. 1 schematically illustrates a hearing aid,

FIG. 2 schematically illustrates sensors,

FIG. 3 schematically illustrates a hearing aid on an ear,

FIG. 4 schematically illustrates a hearing aid and a phone,

FIG. 5-9 schematically illustrates various arrangements of hearing aidcomponents, and

FIG. 10 schematically illustrates steps of a method.

DETAILED DESCRIPTION

The detailed description set forth below in connection with the appendeddrawings is intended as a description of various configurations. Thedetailed description includes specific details for the purpose ofproviding a thorough understanding of various concepts. However, it willbe apparent to those skilled in the art that these concepts may bepracticed without these specific details. Several aspects of theapparatus and methods are described by various blocks, functional units,modules, components, circuits, steps, processes, algorithms, etc.(collectively referred to as “elements”). Depending upon particularapplication, design constraints or other reasons, these elements may beimplemented using electronic hardware, computer program, or anycombination thereof.

The electronic hardware may include microprocessors, microcontrollers,digital signal processors (DSPs), field programmable gate arrays(FPGAs), programmable logic devices (PLDs), gated logic, discretehardware circuits, and other suitable hardware configured to perform thevarious functionality described throughout this disclosure. Computerprogram shall be construed broadly to mean instructions, instructionsets, code, code segments, program code, programs, subprograms, softwaremodules, applications, software applications, software packages,routines, subroutines, objects, executables, threads of execution,procedures, functions, etc., whether referred to as software, firmware,middleware, microcode, hardware description language, or otherwise.

A hearing aid device, or simply hearing aid, may be a hearing aid thatis adapted to improve or augment the hearing capability of a user byreceiving an acoustic signal from a user's surroundings, generating acorresponding audio signal, possibly modifying the audio signal andproviding the possibly modified audio signal as an audible signal to atleast one of the user's ears. The “hearing aid device” may further referto a device such as an earphone or a headset adapted to receive an audiosignal electronically, possibly modifying the audio signal and providingthe possibly modified audio signals as an audible signal to at least oneof the user's ears. Such audible signals may be provided in the form ofan acoustic signal radiated into the user's outer ear, or an acousticsignal transferred as mechanical vibrations to the user's inner earsthrough bone structure of the user's head and/or through parts of middleear of the user or electric signals transferred directly or indirectlyto cochlear nerve and/or to auditory cortex of the user.

The hearing aid device is adapted to be worn in any known way. This mayinclude i) arranging a unit of the hearing aid device behind the earwith a tube leading air-borne acoustic signals into the ear canal orwith a receiver/loudspeaker arranged close to or in the ear canal suchas in a Behind-the-Ear type hearing aid, and/or ii) arranging thehearing aid device entirely or partly in the pinna and/or in the earcanal of the user such as in a In-the-Ear type hearing aid orIn-the-Canal/Completely-in-Canal type hearing aid, or iii) arranging aunit of the hearing aid device attached to a fixture implanted into theskull bone such as in Bone Anchored Hearing Aid or Cochlear Implant, oriv) arranging a unit of the hearing aid device as an entirely or partlyimplanted unit such as in Bone Anchored Hearing Aid or Cochlear Implant.

A “hearing system” refers to a system comprising one or two hearing aiddevices, and a “binaural hearing system” refers to a system comprisingtwo hearing aid devices where the devices are adapted to cooperativelyprovide audible signals to both of the user's ears. The hearing systemor binaural hearing system may further include auxiliary device(s) thatcommunicates with at least one hearing aid device, the auxiliary deviceaffecting the operation of the hearing aid devices and/or benefittingfrom the functioning of the hearing aid devices. A wired or wirelesscommunication link between the at least one hearing aid device and theauxiliary device is established that allows for exchanging information(e.g. control and status signals, possibly audio signals) between the atleast one hearing aid device and the auxiliary device. Such auxiliarydevices may include at least one of remote controls, remote microphones,audio gateway devices, mobile phones, public-address systems, car audiosystems or music players or a combination thereof. The audio gateway isadapted to receive a multitude of audio signals such as from anentertainment device like a TV or a music player, a telephone apparatuslike a mobile telephone or a computer, a PC. The audio gateway isfurther adapted to select and/or combine an appropriate one of thereceived audio signals (or combination of signals) for transmission tothe at least one hearing aid device. The remote control is adapted tocontrol functionality and operation of the at least one hearing aiddevices. The function of the remote control may be implemented in aSmartPhone or other electronic device, the SmartPhone/electronic devicepossibly running an application that controls functionality of the atleast one hearing aid device.

In general, a hearing aid device includes i) an input unit such as amicrophone for receiving an acoustic signal from a user's surroundingsand providing a corresponding input audio signal, and/or ii) a receivingunit for electronically receiving an input audio signal. The hearing aiddevice further includes a signal processing unit for processing theinput audio signal and an output unit for providing an audible signal tothe user in dependence on the processed audio signal.

The input unit may include multiple input microphones, e.g. forproviding direction-dependent audio signal processing. Such directionalmicrophone system is adapted to enhance a target acoustic source among amultitude of acoustic sources in the user's environment. In one aspect,the directional system is adapted to detect (such as adaptively detect)from which direction a particular part of the microphone signaloriginates. This may be achieved by using conventionally known methods.The signal processing unit may include amplifier that is adapted toapply a frequency dependent gain to the input audio signal. The signalprocessing unit may further be adapted to provide other relevantfunctionality such as compression, noise reduction, etc. The output unitmay include an output transducer such as a loudspeaker/receiver forproviding an air-borne acoustic signal transcutaneously orpercutaneously to the skull bone or a vibrator for providing astructure-borne or liquid-borne acoustic signal. In some hearing aiddevices, the output unit may include one or more output electrodes forproviding the electric signals such as in a Cochlear Implant.

The present method for compensating an estimate of a core bodytemperature of a hearing aid wearer/user may be used in hearing aidshaving external stimulation of the ear of the user, i.e. in BTE-, ITE-and RITE-style hearing aids, but also for bone-anchored hearing aids aswell as cochlear implant-type hearing aids.

A Cochlear Implant typically includes i) an external part for picking upand processing sound from the environment, and for determining sequencesof pulses for stimulation of the electrodes in dependence on the currentinput sound, ii) a (typically wireless, e.g. inductive) communicationlink for simultaneously transmitting information about the stimulationsequences and for transferring energy to iii) an implanted part allowingthe stimulation to be generated and applied to a number of electrodes,which are implantable in different locations of the cochlea allowing astimulation of different frequencies of the audible range.

When utilized in a cochlear hearing aid, the first temperature sensormay be arranged to be placed in the ear canal and connected to thebehind-the-ear part via a connecting member in a similar way as ineither a RITE or BTE hearing aid configuration.

Generally, the present disclosure relates to a hearing aid, a hearingaid system, a binaural hearing aid system and a method.

FIG. 1 illustrates a hearing aid device 10 having a temperature sensorin the in-the-ear part, here illustrated with a dome attached to thehousing. A reference, temperature, sensor is included in thebehind-the-ear housing. The hearing aid 10 comprises a first housing,here being the in the in-the-ear part, the first housing beingconfigured to be positioned at least partly in the ear canal of theuser. An output transducer is also arranged in the first housing, sothat the output transducer is arranged in the ear canal of the userduring use of the hearing aid. A temperature processor configured toprocess signals from the first temperature sensor is included in thebehind the ear housing. A reference temperature sensor in communicationwith the temperature processor is also arranged in the housing. Thetemperature processor is configured to estimate, based on both the firstmeasure body temperature of the user and the reference temperature, acore body temperature of the user.

The hearing aid may, as described elsewhere, be configured in a numberof ways, where the common feature is that a temperature sensor isincluded, and that this temperature sensor preferably is to be arrangedas close to the ear drum as possible.

One particular application is hearing aid devices where areceiver/speaker is placed in the ear canal in close proximity to thetemperature sensing element. Furthermore, a temperature sensor behindthe ear is advantageous.

To obtain a reliable and accurate measurement of body core temperature,the present disclosure provides a combined hard- and software solution.The present disclosure utilizes additional sensor inputs and signalprocessing to correct for external factors influencing the measurementof the core body temperature of the user.

The temperature from behind-the-ear sensor, or reference sensor, is usedto correct for variations in e.g. ambient temperature, as there will bea thermal energy conduction through the wires connecting the in-earsensor and any hardware positioned behind the ear, i.e. behind thepinna, and radiated heat in and out of the ear canal, which all willinfluence measurements.

Similarly, movement of the user, like walking and/or running, willincrease convection, where accelerometer data can be used to increasereliability in these cases. Such information may be handled similarly toambient temperature information/data. Also, wind will have similareffect, but may be harder to compensate for as movement is notnecessarily detected. Some sensor such as a microphone may however beused to detect these cases. As an example, the microphones of thehearing aid may be used.

The amount of energy being dissipated in the receiver, i.e. the outputtransducer of the hearing aid, which may also depend on acousticalenvironment and fitting profile, including receiver and dome model, maybe estimated from the mentioned parameters and used for compensation.Such a parameter could be power consumption of the receiver.

The solution is thought to produce superior results and comfort relativeto the currently known solutions, which usually occlude the ear toprovide a uniform environment for the measurement and then use a simple(non-intelligent) calibration for mapping measured temperature to acorrect body core temperature.

FIG. 2 schematically illustrates a number of possible sensors and sensorcombinations.

Generally, data used in the method may be aggregated over time, or inother ways preprocessed, e.g. to reduce variations. A lowpassfilter-type processing may be used to smooth data. Further, data from atime period, e.g. just prior to the calculation/estimation, may be used,so that the corrected estimate is based on more than only the instantmeasurement of the additional data.

In some implementations of the hearing aid according to the presentdisclosure, parts of the system may be absent, such as the receiver (ina BTE implementation), temperature sensor behind the ear or similar.

The method described herein will also be applicable to ITE-style hearingaids, where the ‘ambient temperature’ estimate produced from the sensorbehind the ear is placed inside the e.g. on the faceplate of the custominstrument, and thus not as such external to the ear, but at least in adistance from the first temperature sensor.

Information, or data, about ambient temperature can be gathered fromexternal devices instead of using a temperature sensor positioned behindthe ear of the user. This could include auxiliary devices, such as amicrophone device configured to be positioned at a table and/or onanother person whom the user intends to hear better. Also, temperaturemay be obtained from internet enabled devices, e.g. thermometers withIoT capabilities.

The hearing aid and method according to the present disclosure couldutilize additional sensor inputs, such as heart rate (variability),oxygenation, accelerometer, microphones or ambient light sensing toimprove reliability by providing more inputs to the algorithm. E.g.detecting physical activity, movement, wind or sunlight.

Many hearing aid users wear a hearing device in each ear, this isusually referred to as a binaural hearing aid. Utilizing setup where ahearing aid device is placed in each ear could be used to increaseaccuracy and/or scenario detection. One example is the statisticalimprovement of accuracy obtained by having two independent sensorsystems. Another example is if at one ear heating is detected via thebehind the ear temperature sensor, while the other does not registersuch an increase. This could indicate sunlight coming from one side.Wind detected at one side would have a similar effect, albeit coolingand not heating the reference temperature sensor. Thus, a binauralsystem setup could be used to detect steady state scenarios with highquality data.

Depending on the number of inputs to the compensation algorithm andimplementation the processing can be quite computationally intensive. Ina small, battery powered device like a hearing aid device, reducingprocessing requirements may be important for battery life extension.Offloading processing to another device, such as a smartphone, wearableand/or a cloud server may increase power efficiency of the hearing aiddevice and leave more processing power for latency sensitive algorithmsrunning on the hearing aid device.

The method as disclosed herein is not limited to hearing aid devicesensors, but could include inputs from other sensors found in devicessuch as phones, e.g. location sensors (GPS), statically located devices,e.g. weather stations, or other wearables (e.g. Smartwatches) becomingincreasingly available.

The part of the hearing instrument including the in-ear temperaturesensor could include a memory device so that the hearing aid is able todetermine, based on identification information stored in the memorydevice, exactly which sensor or sensors are present in the device. Thisinformation may then be provided to the processor which then maydetermine if some sensor data should be given more weight in thecompensation due to higher accuracy. It will also serve as s simpler wayto detect sensors in-stead of requiring fixed addresses on a digital busfor each sensor and/or sensor type.

FIG. 3 schematically illustrates positioning of a in-the-ear part with atemperature sensor.

FIG. 4 schematically illustrates a hearing aid in wireless communicationwith a smartphone.

FIG. 5 schematically illustrates components of a hearing aid with afirst sensor and a reference sensor.

FIG. 6 schematically illustrates components of a hearing aid with afirst sensor and a reference sensor, where the first sensor and theoutput transducer are arranged in a housing separate from the housinghaving the input transducer, the reference sensor and the processor.

FIG. 7 schematically illustrates components of a hearing aid with afirst sensor and a reference sensor, where the first sensor and theoutput transducer are arranged in a housing separate from the housinghaving the input transducer and the processor. The reference sensor isin a third housing and in communication with the processor.

FIG. 8 schematically illustrates components of a hearing aid with afirst sensor and a reference sensor, where the first sensor, the outputtransducer, the input transducer and the processor are arranged in ahousing separate from the housing having the reference sensor.

FIG. 9 schematically illustrates components of a hearing aid where allcomponents are included in the same housing.

FIG. 10 schematically illustrates steps of a method according to thepresent disclosure.

In an aspect, the functions may be stored on or encoded as one or moreinstructions or code on a tangible computer-readable medium. Thecomputer readable medium includes computer storage media adapted tostore a computer program comprising program codes, which when run on aprocessing system causes the data processing system to perform at leastsome (such as a majority or all) of the steps of the method describedabove, in the and in the claims.

By way of example, and not limitation, such computer-readable media cancomprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage,magnetic disk storage or other magnetic storage devices, or any othermedium that can be used to carry or store desired program code in theform of instructions or data structures and that can be accessed by acomputer. Disk and disc, as used herein, includes compact disc (CD),laser disc, optical disc, digital versatile disc (DVD), floppy disk andBlu-ray disc where disks usually reproduce data magnetically, whilediscs reproduce data optically with lasers. Combinations of the aboveshould also be included within the scope of computer-readable media. Inaddition to being stored on a tangible medium, the computer program canalso be transmitted via a transmission medium such as a wired orwireless link or a network, e.g. the Internet, and loaded into a dataprocessing system for being executed at a location different from thatof the tangible medium.

In an aspect, a data processing system comprising a processor adapted toexecute the computer program for causing the processor to perform atleast some (such as a majority or all) of the steps of the methoddescribed above and in the claims.

It is intended that the structural features of the devices describedabove, either in the detailed description and/or in the claims, may becombined with steps of the method, when appropriately substituted by acorresponding process.

As used, the singular forms “a,” “an,” and “the” are intended to includethe plural forms as well (i.e. to have the meaning “at least one”),unless expressly stated otherwise. It will be further understood thatthe terms “includes,” “comprises,” “including,” and/or “comprising,”when used in this specification, specify the presence of statedfeatures, integers, steps, operations, elements, and/or components, butdo not preclude the presence or addition of one or more other features,integers, steps, operations, elements, components, and/or groupsthereof. It will also be understood that when an element is referred toas being “connected” or “coupled” to another element, it can be directlyconnected or coupled to the other element but an intervening element mayalso be present, unless expressly stated otherwise. Furthermore,“connected” or “coupled” as used herein may include wirelessly connectedor coupled. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items. The steps ofany disclosed method is not limited to the exact order stated herein,unless expressly stated otherwise.

It should be appreciated that reference throughout this specification to“one embodiment” or “an embodiment” or “an aspect” or features includedas “may” means that a particular feature, structure or characteristicdescribed in connection with the embodiment is included in at least oneembodiment of the disclosure. Furthermore, the particular features,structures or characteristics may be combined as suitable in one or moreembodiments of the disclosure. The previous description is provided toenable any person skilled in the art to practice the various aspectsdescribed herein. Various modifications to these aspects will be readilyapparent to those skilled in the art, and the generic principles definedherein may be applied to other aspects.

The claims are not intended to be limited to the aspects shown herein,but is to be accorded the full scope consistent with the language of theclaims, wherein reference to an element in the singular is not intendedto mean “one and only one” unless specifically so stated, but rather“one or more.” Unless specifically stated otherwise, the term “some”refers to one or more.

Accordingly, the scope should be judged in terms of the claims thatfollow.

The invention claimed is:
 1. A hearing aid having a first housing, thefirst housing being configured to be positioned at least partly in anear canal of a user, a first temperature sensor arranged in the firsthousing, an output transducer arranged in the first housing, atemperature processor configured to process signals from the firsttemperature sensor, a reference temperature sensor in communication withthe temperature processor, and a motion sensor configured to provide anindication of movement of the hearing aid representing movement, whereinthe temperature processor includes movement of the hearing aid as ameasure of movement of the user when estimating the core bodytemperature of the user, and the temperature processor is configured toestimate, based on both the first measure body temperature of the userand the reference temperature, a core body temperature of the user. 2.The hearing aid according to claim 1, wherein the temperature processoris further configured to provide the estimate based on an amount ofoutput transducer activity to compensate for the local heating of thetemperature sensor originating from heat produced by the outputtransducer.
 3. The hearing aid according to claim 1, wherein firsthousing comprises a first end and an opposite second end, wherein thefirst temperature sensor is arranged in the first end of the firsthousing and the output transducer is arranged at an extreme end of theopposite second end.
 4. The hearing aid according to claim 1, whereinthe hearing aid further comprises a second housing, the referencetemperature sensor being arranged in the second housing.
 5. The hearingaid according to claim 4, wherein the second housing is configured to bepositioned behind the ear of the user, or wherein the second housing isconfigured to be positioned in the concha of the user and/or the fossatriangularis.
 6. The hearing aid according to claim 1, wherein thereference temperature sensor is arranged in an external device in wiredor wireless communication with the temperature processor.
 7. The hearingaid according to claim 6, wherein the external device is a telephonedevice or an auxiliary device having a microphone array.
 8. The hearingaid according to claim 1, wherein the motion sensor is or includes anaccelerometer.
 9. The hearing aid according to claim 1, wherein thehearing aid further comprises a secondary sensor configured to obtain ameasure indicative of wind at the hearing aid, and the temperatureprocessor includes wind measure at the hearing aid when estimating thecore body temperature of the user.
 10. A method of obtaining an estimateof the core body temperature of a user, wherein a hearing aid comprisinga first housing configured to be positioned at least partly in thcan earcanal of the user, the first housing including a first temperaturesensor, a temperature processor configured to process signals from thefirst temperature sensor, a reference temperature sensor incommunication with the temperature processor, wherein the hearing aidfurther comprises a motion sensor configured to provide an indication ofmovement of the hearing aid, the method including: arranging the firsthousing in or at the ear canal of the user so that the first temperaturesensor is in the ear canal of the user, the reference temperature sensorbeing arranged outside the ear canal of the user, obtaining from thefirst temperature sensor a first measure of body temperature of theuser, obtaining data relating to movement of the hearing aid as ameasure of movement of the user, obtaining a reference temperature fromthe reference temperature sensor, and estimating, based on both thefirst measure body temperature of the user, the reference temperatureand the data relating to movement of the hearing aid, a core bodytemperature of the user.
 11. The method according to claim 10, whereinthe first housing further comprises an output transducer, and the methodfurther comprises a step of: compensating for local heating of thetemperature sensor originating from heat produced by the outputtransducer during output transducer activity when estimating the corebody temperature.
 12. The method according to claim 10, wherein thereference temperature sensor is arranged in an external device in wiredor wireless communication with the temperature processor, and the methodfurther comprises a step of: communicating the reference temperaturewired or wirelessly from the external device to the temperatureprocessor.
 13. The method according to claim 10, wherein the hearing aidfurther comprises a secondary sensor configured to obtain a measureindicative of wind at the hearing aid, and the method includes a step ofobtaining data relating to wind measure at the hearing aid, and the stepof estimating the core body temperature of the user includes the datarelating to wind measure.